A couple weeks ago I made my first chainsaw chain replacement and was the first time I had removed the bar. It seemed straightforward and went back together smoothly. I noticed it had a slight lean to the left but checking everything 3 times did not change it. I cautiously fired it up and she ran great. I checked others at Lowes and they all (gas powered once at least) seem to do this. Why? I normally put the front plastic part of the chainsaw flush against the log being cut (when bucking logs) and this produces a slightly angled cut. Now I hold it a little tilted back the other way to get a flush cut. Can some explain this? My saw is a Poulon by the way.